> For the complete documentation index, see [llms.txt](https://guides.clickatell.com/release-notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guides.clickatell.com/release-notes/release-notes-archive/2023-release-notes/q3-2023/automated-messaging/default-flow-for-invalid-input.md).

# Default flow for invalid input

This feature was added to all [Branch/Logic Split nodes](https://guides.clickatell.com/flow/user-facing-nodes/branch-logic-split) and ensures that, if the customer enters an invalid option (i.e., an option that is not part of the list presented to the customer), you can configure a "default" node/flow to follow automatically. This default flow is optional, and if not set up, the node will simply repeat itself if an invalid option is entered.

Watch the video below to see a simplified example of the default flow in action.

{% hint style="info" %}
If you are interested in utilizing our NLP offering, contact your account manager or our [Sales Team](https://www.clickatell.com/contact/contact-sales/).
{% endhint %}

{% embed url="<https://vimeo.com/860927045/1ae9ed9711?share=copy&ts=0>" %}